docs: def com_google_fonts_check_whitespace_widths(ttFont):
    """Whitespace and non-breaking space have the same width?"""
    from fontbakery.utils import get_glyph_name
  
    space_name = get_glyph_name(ttFont, 0x0020)
    nbsp_name = get_glyph_name(ttFont, 0x00A0)
  
    space_width = ttFont['hmtx'][space_name][0]
    nbsp_width = ttFont['hmtx'][nbsp_name][0]
  
    if space_width > 0 and space_width == nbsp_width:
      yield PASS, "Whitespace and non-breaking space have the same width."
    else:
      yield FAIL, ("Whitespace and non-breaking space have differing width:"
                   " Whitespace ({}) is {} font units wide, non-breaking space"
                   " ({}) is {} font units wide. Both should be positive and the"
                   " same.").format(space_name, space_width, nbsp_name,
                                    nbsp_width)